I'm having trouble with a specific side of my gay group of friends.

Hi guys, wall of text ahead, I'm sorry. (and i'm on my phone so the formatting might be a bit off)I have two questions but a bit of context is needed before.I have a group of gay friends I really get along with, most of them are real friends and one of them is my best friend. Now, here's the thing. We all met via Twitter so there is this kind of the City name-gay-Twitter community which is larger than said group of friends. The problem is that the group already knew the two boyfriends I have introduced them to, via Twitter and via other Twitter users that had hooked up with them. The problem I have is not with the former sexual life, obviously, but with the fact my friends knew (and still know) them in ways that I don't really want my friends to know my bfs. In other words, I guess that would be that I don't really want my friends to know my potential bfs before I introduce them, but it seems to be pretty complicated in this damn city.*Tl;dr: my gay friends knew my last two bfs and they knew of their sexual history before I introduced them, I feel really uncomfortable with that. *So here are my two questions. 1. Is that pattern something pretty common in big cities and I am doomed to cope with it? 2. I think this is kind of unhealthy for both the friendship and the relationships I may have. What do you guys think?